... 1、入院率偏倚（Aohrlssion rate bias）Poca 2、奈曼比偏倚（Cohort cross） 3、检出征候偏倚（Qetection signal bias） ...
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Methods A cross sectional and a retrospective cohort study and animal experiment were carried out.
方法采用横断面调查、回顾队列调查和动物实验等方法。
The researchers cross-referenced the records to another register, the cause of death register, so they could calculate Numbers of deaths from prostate cancer in the cohort and competing causes.
研究人员交叉参考了另一个注册机构死亡注册原因的记录，所以他们能对这组前列腺癌病人计算出死亡的人数和对抗的死因。
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